solve: x(x+5)-6=x squared+5x+6?

x^2+5x-6=x^2+5x+6
Subtract x^2 and 5x from both, yielding -6=6, which obviously isn't true. So there is no answer.

x ² + 5x - 6 = x ² + 5x + 6
Something funny here !

x(x + 5) - 6 = x^2 + 5x + 6
x*x + x*5 - 6 = x^2 + 5x + 6
x^2 + 5x - 6 = x^2 + 5x + 6
x^2 - x^2 + 5x - 5x = 6 + 6
0 = 12
(no solutions)